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PduComposer.javaAPI DocAndroid 1.5 API38441Wed May 06 22:41:56 BST 2009com.google.android.mms.pdu

PduComposer

public class PduComposer extends Object

Fields Summary
private static final int
PDU_PHONE_NUMBER_ADDRESS_TYPE
Address type.
private static final int
PDU_EMAIL_ADDRESS_TYPE
private static final int
PDU_IPV4_ADDRESS_TYPE
private static final int
PDU_IPV6_ADDRESS_TYPE
private static final int
PDU_UNKNOWN_ADDRESS_TYPE
static final String
REGEXP_PHONE_NUMBER_ADDRESS_TYPE
Address regular expression string.
static final String
REGEXP_EMAIL_ADDRESS_TYPE
static final String
REGEXP_IPV6_ADDRESS_TYPE
static final String
REGEXP_IPV4_ADDRESS_TYPE
static final String
STRING_PHONE_NUMBER_ADDRESS_TYPE
The postfix strings of address.
static final String
STRING_IPV4_ADDRESS_TYPE
static final String
STRING_IPV6_ADDRESS_TYPE
private static final int
PDU_COMPOSE_SUCCESS
Error values.
private static final int
PDU_COMPOSE_CONTENT_ERROR
private static final int
PDU_COMPOSE_FIELD_NOT_SET
private static final int
PDU_COMPOSE_FIELD_NOT_SUPPORTED
private static final int
QUOTED_STRING_FLAG
WAP values defined in WSP spec.
private static final int
END_STRING_FLAG
private static final int
LENGTH_QUOTE
private static final int
TEXT_MAX
private static final int
SHORT_INTEGER_MAX
private static final int
LONG_INTEGER_LENGTH_MAX
private static final int
PDU_COMPOSER_BLOCK_SIZE
Block size when read data from InputStream.
protected ByteArrayOutputStream
mMessage
The output message.
private GenericPdu
mPdu
The PDU.
protected int
mPosition
Current visiting position of the mMessage.
private BufferStack
mStack
Message compose buffer stack.
private final android.content.ContentResolver
mResolver
Content resolver.
private PduHeaders
mPduHeader
Header of this pdu.
private static HashMap
mContentTypeMap
Map of all content type
Constructors Summary
public PduComposer(android.content.Context context, GenericPdu pdu)
Constructor.

param
context the context
param
pdu the pdu to be composed


     
        mContentTypeMap = new HashMap<String, Integer>();

        int i;
        for (i = 0; i < PduContentTypes.contentTypes.length; i++) {
            mContentTypeMap.put(PduContentTypes.contentTypes[i], i);
        }
    
        mPdu = pdu;
        mResolver = context.getContentResolver();
        mPduHeader = pdu.getPduHeaders();
        mStack = new BufferStack();
        mMessage = new ByteArrayOutputStream();
        mPosition = 0;
Methods Summary
protected voidappend(int value)
Append a byte to mMessage.

        mMessage.write(value);
        mPosition ++;
protected voidappendDateValue(long date)
Append date value into mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From OMA-TS-MMS-ENC-V1_3-20050927-C:
         * Date-value = Long-integer
         */
        appendLongInteger(date);
protected voidappendEncodedString(EncodedStringValue enStr)
Append encoded string value to mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From OMA-TS-MMS-ENC-V1_3-20050927-C:
         * Encoded-string-value = Text-string | Value-length Char-set Text-string
         */
        assert(enStr != null);

        int charset = enStr.getCharacterSet();
        byte[] textString = enStr.getTextString();
        if (null == textString) {
            return;
        }

        /*
         * In the implementation of EncodedStringValue, the charset field will
         * never be 0. It will always be composed as
         * Encoded-string-value = Value-length Char-set Text-string
         */
        mStack.newbuf();
        PositionMarker start = mStack.mark();

        appendShortInteger(charset);
        appendTextString(textString);

        int len = start.getLength();
        mStack.pop();
        appendValueLength(len);
        mStack.copy();
private intappendHeader(int field)
Append header to mMessage.

        switch (field) {
            case PduHeaders.MMS_VERSION:
                appendOctet(field);

                int version = mPduHeader.getOctet(field);
                if (0 == version) {
                    appendShortInteger(PduHeaders.CURRENT_MMS_VERSION);
                } else {
                    appendShortInteger(version);
                }

                break;

            case PduHeaders.MESSAGE_ID:
            case PduHeaders.TRANSACTION_ID:
                byte[] textString = mPduHeader.getTextString(field);
                if (null == textString) {
                    return PDU_COMPOSE_FIELD_NOT_SET;
                }

                appendOctet(field);
                appendTextString(textString);
                break;

            case PduHeaders.TO:
            case PduHeaders.BCC:
            case PduHeaders.CC:
                EncodedStringValue[] addr = mPduHeader.getEncodedStringValues(field);

                if (null == addr) {
                    return PDU_COMPOSE_FIELD_NOT_SET;
                }

                EncodedStringValue temp;
                for (int i = 0; i < addr.length; i++) {
                    try {
                        int addressType = checkAddressType(addr[i].getString());
                        temp = EncodedStringValue.copy(addr[i]);
                        if (PDU_PHONE_NUMBER_ADDRESS_TYPE == addressType) {
                            // Phone number.
                            temp.appendTextString(
                                    STRING_PHONE_NUMBER_ADDRESS_TYPE.getBytes());
                        } else if (PDU_IPV4_ADDRESS_TYPE == addressType) {
                            // Ipv4 address.
                            temp.appendTextString(STRING_IPV4_ADDRESS_TYPE.getBytes());
                        } else if (PDU_IPV6_ADDRESS_TYPE == addressType) {
                            // Ipv6 address.
                            temp.appendTextString(STRING_IPV6_ADDRESS_TYPE.getBytes());
                        }
                    } catch (NullPointerException e) {
                        return PDU_COMPOSE_CONTENT_ERROR;
                    }

                    appendOctet(field);
                    appendEncodedString(temp);
                }
                break;

            case PduHeaders.FROM:
                // Value-length (Address-present-token Encoded-string-value | Insert-address-token)
                appendOctet(field);

                EncodedStringValue from = mPduHeader.getEncodedStringValue(field);
                if ((from == null)
                        || new String(from.getTextString()).equals(
                                PduHeaders.FROM_INSERT_ADDRESS_TOKEN_STR)) {
                    // Length of from = 1
                    append(1);
                    // Insert-address-token = <Octet 129>
                    append(PduHeaders.FROM_INSERT_ADDRESS_TOKEN);
                } else {
                    mStack.newbuf();
                    PositionMarker fstart = mStack.mark();

                    // Address-present-token = <Octet 128>
                    append(PduHeaders.FROM_ADDRESS_PRESENT_TOKEN);
                    appendEncodedString(from);

                    int flen = fstart.getLength();
                    mStack.pop();
                    appendValueLength(flen);
                    mStack.copy();
                }
                break;

            case PduHeaders.READ_STATUS:
            case PduHeaders.STATUS:
            case PduHeaders.REPORT_ALLOWED:
            case PduHeaders.PRIORITY:
            case PduHeaders.DELIVERY_REPORT:
            case PduHeaders.READ_REPORT:
                int octet = mPduHeader.getOctet(field);
                if (0 == octet) {
                    return PDU_COMPOSE_FIELD_NOT_SET;
                }

                appendOctet(field);
                appendOctet(octet);
                break;

            case PduHeaders.DATE:
                long date = mPduHeader.getLongInteger(field);
                if (-1 == date) {
                    return PDU_COMPOSE_FIELD_NOT_SET;
                }

                appendOctet(field);
                appendDateValue(date);
                break;

            case PduHeaders.SUBJECT:
                EncodedStringValue enString =
                    mPduHeader.getEncodedStringValue(field);
                if (null == enString) {
                    return PDU_COMPOSE_FIELD_NOT_SET;
                }

                appendOctet(field);
                appendEncodedString(enString);
                break;

            case PduHeaders.MESSAGE_CLASS:
                byte[] messageClass = mPduHeader.getTextString(field);
                if (null == messageClass) {
                    return PDU_COMPOSE_FIELD_NOT_SET;
                }

                appendOctet(field);
                if (Arrays.equals(messageClass,
                        PduHeaders.MESSAGE_CLASS_ADVERTISEMENT_STR.getBytes())) {
                    appendOctet(PduHeaders.MESSAGE_CLASS_ADVERTISEMENT);
                } else if (Arrays.equals(messageClass,
                        PduHeaders.MESSAGE_CLASS_AUTO_STR.getBytes())) {
                    appendOctet(PduHeaders.MESSAGE_CLASS_AUTO);
                } else if (Arrays.equals(messageClass,
                        PduHeaders.MESSAGE_CLASS_PERSONAL_STR.getBytes())) {
                    appendOctet(PduHeaders.MESSAGE_CLASS_PERSONAL);
                } else if (Arrays.equals(messageClass,
                        PduHeaders.MESSAGE_CLASS_INFORMATIONAL_STR.getBytes())) {
                    appendOctet(PduHeaders.MESSAGE_CLASS_INFORMATIONAL);
                } else {
                    appendTextString(messageClass);
                }
                break;

            case PduHeaders.EXPIRY:
                long expiry = mPduHeader.getLongInteger(field);
                if (-1 == expiry) {
                    return PDU_COMPOSE_FIELD_NOT_SET;
                }

                appendOctet(field);

                mStack.newbuf();
                PositionMarker expiryStart = mStack.mark();

                append(PduHeaders.VALUE_RELATIVE_TOKEN);
                appendLongInteger(expiry);

                int expiryLength = expiryStart.getLength();
                mStack.pop();
                appendValueLength(expiryLength);
                mStack.copy();
                break;

            default:
                return PDU_COMPOSE_FIELD_NOT_SUPPORTED;
        }

        return PDU_COMPOSE_SUCCESS;
protected voidappendLongInteger(long longInt)
Append long integer into mMessage. it's used for really long integers. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * Long-integer = Short-length Multi-octet-integer
         * ; The Short-length indicates the length of the Multi-octet-integer
         * Multi-octet-integer = 1*30 OCTET
         * ; The content octets shall be an unsigned integer value with the
         * ; most significant octet encoded first (big-endian representation).
         * ; The minimum number of octets must be used to encode the value.
         */
        int size;
        long temp = longInt;

        // Count the length of the long integer.
        for(size = 0; (temp != 0) && (size < LONG_INTEGER_LENGTH_MAX); size++) {
            temp = (temp >>> 8);
        }

        // Set Length.
        appendShortLength(size);

        // Count and set the long integer.
        int i;
        int shift = (size -1) * 8;

        for (i = 0; i < size; i++) {
            append((int)((longInt >>> shift) & 0xff));
            shift = shift - 8;
        }
protected voidappendOctet(int number)
Append an octet number between 128 and 255 into mMessage. NOTE: A value between 0 and 127 should be appended by using appendShortInteger. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        append(number);
protected voidappendQuotedString(byte[] text)
Append quoted string to mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * Quoted-string = <Octet 34> *TEXT End-of-string
         * ;The TEXT encodes an RFC2616 Quoted-string with the enclosing
         * ;quotation-marks <"> removed.
         */
        append(QUOTED_STRING_FLAG);
        arraycopy(text, 0, text.length);
        append(END_STRING_FLAG);
protected voidappendQuotedString(java.lang.String str)
Append quoted string to mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * Quoted-string = <Octet 34> *TEXT End-of-string
         * ;The TEXT encodes an RFC2616 Quoted-string with the enclosing
         * ;quotation-marks <"> removed.
         */
        appendQuotedString(str.getBytes());
protected voidappendShortInteger(int value)
Append short integer value to mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * Short-integer = OCTET
         * ; Integers in range 0-127 shall be encoded as a one octet value
         * ; with the most significant bit set to one (1xxx xxxx) and with
         * ; the value in the remaining least significant bits.
         * In our implementation, only low 7 bits are stored and otherwise
         * bits are ignored.
         */
        append((value | 0x80) & 0xff);
protected voidappendShortLength(int value)
Append a short length into mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * Short-length = <Any octet 0-30>
         */
        append(value);
protected voidappendTextString(java.lang.String str)
Append text string into mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * Text-string = [Quote] *TEXT End-of-string
         * ; If the first character in the TEXT is in the range of 128-255,
         * ; a Quote character must precede it. Otherwise the Quote character
         * ;must be omitted. The Quote is not part of the contents.
         */
        appendTextString(str.getBytes());
protected voidappendTextString(byte[] text)
Append text string into mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * Text-string = [Quote] *TEXT End-of-string
         * ; If the first character in the TEXT is in the range of 128-255,
         * ; a Quote character must precede it. Otherwise the Quote character
         * ;must be omitted. The Quote is not part of the contents.
         */
        if (((text[0])&0xff) > TEXT_MAX) { // No need to check for <= 255
            append(TEXT_MAX);
        }

        arraycopy(text, 0, text.length);
        append(0);
protected voidappendUintvarInteger(long value)
Append uintvar integer into mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * To encode a large unsigned integer, split it into 7-bit fragments
         * and place them in the payloads of multiple octets. The most significant
         * bits are placed in the first octets with the least significant bits
         * ending up in the last octet. All octets MUST set the Continue bit to 1
         * except the last octet, which MUST set the Continue bit to 0.
         */
        int i;
        long max = SHORT_INTEGER_MAX;

        for (i = 0; i < 5; i++) {
            if (value < max) {
                break;
            }

            max = (max << 7) | 0x7fl;
        }

        while(i > 0) {
            long temp = value >>> (i * 7);
            temp = temp & 0x7f;

            append((int)((temp | 0x80) & 0xff));

            i--;
        }

        append((int)(value & 0x7f));
protected voidappendValueLength(long value)
Append value length to mMessage. This implementation doesn't check the validity of parameter, since it assumes that the values are validated in the GenericPdu setter methods.

        /*
         * From WAP-230-WSP-20010705-a:
         * Value-length = Short-length | (Length-quote Length)
         * ; Value length is used to indicate the length of the value to follow
         * Short-length = <Any octet 0-30>
         * Length-quote = <Octet 31>
         * Length = Uintvar-integer
         */
        if (value < LENGTH_QUOTE) {
            appendShortLength((int) value);
            return;
        }

        append(LENGTH_QUOTE);
        appendUintvarInteger(value);
protected voidarraycopy(byte[] buf, int pos, int length)
Copy buf to mMessage.

        mMessage.write(buf, pos, length);
        mPosition = mPosition + length;
protected static intcheckAddressType(java.lang.String address)
Check address type.

param
address address string without the postfix stinng type, such as "/TYPE=PLMN", "/TYPE=IPv6" and "/TYPE=IPv4"
return
PDU_PHONE_NUMBER_ADDRESS_TYPE if it is phone number, PDU_EMAIL_ADDRESS_TYPE if it is email address, PDU_IPV4_ADDRESS_TYPE if it is ipv4 address, PDU_IPV6_ADDRESS_TYPE if it is ipv6 address, PDU_UNKNOWN_ADDRESS_TYPE if it is unknown.

        /**
         * From OMA-TS-MMS-ENC-V1_3-20050927-C.pdf, section 8.
         * address = ( e-mail / device-address / alphanum-shortcode / num-shortcode)
         * e-mail = mailbox; to the definition of mailbox as described in
         * section 3.4 of [RFC2822], but excluding the
         * obsolete definitions as indicated by the "obs-" prefix.
         * device-address = ( global-phone-number "/TYPE=PLMN" )
         * / ( ipv4 "/TYPE=IPv4" ) / ( ipv6 "/TYPE=IPv6" )
         * / ( escaped-value "/TYPE=" address-type )
         *
         * global-phone-number = ["+"] 1*( DIGIT / written-sep )
         * written-sep =("-"/".")
         *
         * ipv4 = 1*3DIGIT 3( "." 1*3DIGIT ) ; IPv4 address value
         *
         * ipv6 = 4HEXDIG 7( ":" 4HEXDIG ) ; IPv6 address per RFC 2373
         */

        if (null == address) {
            return PDU_UNKNOWN_ADDRESS_TYPE;
        }

        if (address.matches(REGEXP_IPV4_ADDRESS_TYPE)) {
            // Ipv4 address.
            return PDU_IPV4_ADDRESS_TYPE;
        }else if (address.matches(REGEXP_PHONE_NUMBER_ADDRESS_TYPE)) {
            // Phone number.
            return PDU_PHONE_NUMBER_ADDRESS_TYPE;
        } else if (address.matches(REGEXP_EMAIL_ADDRESS_TYPE)) {
            // Email address.
            return PDU_EMAIL_ADDRESS_TYPE;
        } else if (address.matches(REGEXP_IPV6_ADDRESS_TYPE)) {
            // Ipv6 address.
            return PDU_IPV6_ADDRESS_TYPE;
        } else {
            // Unknown address.
            return PDU_UNKNOWN_ADDRESS_TYPE;
        }
public byte[]make()
Make the message. No need to check whether mandatory fields are set, because the constructors of outgoing pdus are taking care of this.

return
OutputStream of maked message. Return null if the PDU is invalid.

        // Get Message-type.
        int type = mPdu.getMessageType();

        /* make the message */
        switch (type) {
            case PduHeaders.MESSAGE_TYPE_SEND_REQ:
                if (makeSendReqPdu() != PDU_COMPOSE_SUCCESS) {
                    return null;
                }
                break;
            case PduHeaders.MESSAGE_TYPE_NOTIFYRESP_IND:
                if (makeNotifyResp() != PDU_COMPOSE_SUCCESS) {
                    return null;
                }
                break;
            case PduHeaders.MESSAGE_TYPE_ACKNOWLEDGE_IND:
                if (makeAckInd() != PDU_COMPOSE_SUCCESS) {
                    return null;
                }
                break;
            case PduHeaders.MESSAGE_TYPE_READ_REC_IND:
                if (makeReadRecInd() != PDU_COMPOSE_SUCCESS) {
                    return null;
                }
                break;
            default:
                return null;
        }

        return mMessage.toByteArray();
private intmakeAckInd()
Make Acknowledge.Ind.

        if (mMessage == null) {
            mMessage = new ByteArrayOutputStream();
            mPosition = 0;
        }

        //    X-Mms-Message-Type
        appendOctet(PduHeaders.MESSAGE_TYPE);
        appendOctet(PduHeaders.MESSAGE_TYPE_ACKNOWLEDGE_IND);

        // X-Mms-Transaction-ID
        if (appendHeader(PduHeaders.TRANSACTION_ID) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        //     X-Mms-MMS-Version
        if (appendHeader(PduHeaders.MMS_VERSION) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // X-Mms-Report-Allowed Optional
        appendHeader(PduHeaders.REPORT_ALLOWED);

        return PDU_COMPOSE_SUCCESS;
private intmakeMessageBody()
Make message body.

        // 1. add body informations
        mStack.newbuf();  // Switching buffer because we need to

        PositionMarker ctStart = mStack.mark();

        // This contentTypeIdentifier should be used for type of attachment...
        String contentType = new String(
                mPduHeader.getTextString(PduHeaders.CONTENT_TYPE));
        Integer contentTypeIdentifier = mContentTypeMap.get(contentType);
        if (contentTypeIdentifier == null) {
            // content type is mandatory
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        appendShortInteger(contentTypeIdentifier.intValue());

        // content-type parameter: start
        PduBody body = ((SendReq) mPdu).getBody();
        if (null == body) {
            // empty message
            appendUintvarInteger(0);
            mStack.pop();
            mStack.copy();
            return PDU_COMPOSE_SUCCESS;
        }

        PduPart part;
        try {
            part = body.getPart(0);

            byte[] start = part.getContentId();
            if (start != null) {
                appendOctet(PduPart.P_DEP_START);
                if (('<" == start[0]) && ('>" == start[start.length - 1])) {
                    appendTextString(start);
                } else {
                    appendTextString("<" + new String(start) + ">");
                }
            }

            // content-type parameter: type
            appendOctet(PduPart.P_CT_MR_TYPE);
            appendTextString(part.getContentType());
        }
        catch (ArrayIndexOutOfBoundsException e){
            e.printStackTrace();
        }

        int ctLength = ctStart.getLength();
        mStack.pop();
        appendValueLength(ctLength);
        mStack.copy();

        // 3. add content
        int partNum = body.getPartsNum();
        appendUintvarInteger(partNum);
        for (int i = 0; i < partNum; i++) {
            part = body.getPart(i);
            mStack.newbuf();  // Leaving space for header lengh and data length
            PositionMarker attachment = mStack.mark();

            mStack.newbuf();  // Leaving space for Content-Type length
            PositionMarker contentTypeBegin = mStack.mark();

            byte[] partContentType = part.getContentType();

            if (partContentType == null) {
                // content type is mandatory
                return PDU_COMPOSE_CONTENT_ERROR;
            }

            // content-type value
            Integer partContentTypeIdentifier =
                mContentTypeMap.get(new String(partContentType));
            if (partContentTypeIdentifier == null) {
                appendTextString(partContentType);
            } else {
                appendShortInteger(partContentTypeIdentifier.intValue());
            }

            /* Content-type parameter : name.
             * The value of name, filename, content-location is the same.
             * Just one of them is enough for this PDU.
             */
            byte[] name = part.getName();

            if (null == name) {
                name = part.getFilename();

                if (null == name) {
                    name = part.getContentLocation();

                    if (null == name) {
                        /* at lease one of name, filename, Content-location
                         * should be available.
                         */
                        return PDU_COMPOSE_CONTENT_ERROR;
                    }
                }
            }
            appendOctet(PduPart.P_DEP_NAME);
            appendTextString(name);

            // content-type parameter : charset
            int charset = part.getCharset();
            if (charset != 0) {
                appendOctet(PduPart.P_CHARSET);
                appendShortInteger(charset);
            }

            int contentTypeLength = contentTypeBegin.getLength();
            mStack.pop();
            appendValueLength(contentTypeLength);
            mStack.copy();

            // content id
            byte[] contentId = part.getContentId();

            if (null != contentId) {
                appendOctet(PduPart.P_CONTENT_ID);
                if (('<" == contentId[0]) && ('>" == contentId[contentId.length - 1])) {
                    appendQuotedString(contentId);
                } else {
                    appendQuotedString("<" + new String(contentId) + ">");
                }
            }

            // content-location
            byte[] contentLocation = part.getContentLocation();
            if (null != contentLocation) {
            	appendOctet(PduPart.P_CONTENT_LOCATION);
            	appendTextString(contentLocation);
            }

            // content
            int headerLength = attachment.getLength();

            int dataLength = 0; // Just for safety...
            byte[] partData = part.getData();

            if (partData != null) {
                arraycopy(partData, 0, partData.length);
                dataLength = partData.length;
            } else {
                InputStream cr;
                try {
                    byte[] buffer = new byte[PDU_COMPOSER_BLOCK_SIZE];
                    cr = mResolver.openInputStream(part.getDataUri());
                    int len = 0;
                    while ((len = cr.read(buffer)) != -1) {
                        mMessage.write(buffer, 0, len);
                        mPosition += len;
                        dataLength += len;
                    }
                } catch (FileNotFoundException e) {
                    return PDU_COMPOSE_CONTENT_ERROR;
                } catch (IOException e) {
                    return PDU_COMPOSE_CONTENT_ERROR;
                } catch (RuntimeException e) {
                    return PDU_COMPOSE_CONTENT_ERROR;
                }
            }

            if (dataLength != (attachment.getLength() - headerLength)) {
                throw new RuntimeException("BUG: Length sanity check failed");
            }

            mStack.pop();
            appendUintvarInteger(headerLength);
            appendUintvarInteger(dataLength);
            mStack.copy();
        }

        return PDU_COMPOSE_SUCCESS;
private intmakeNotifyResp()
Make NotifyResp.Ind.

        if (mMessage == null) {
            mMessage = new ByteArrayOutputStream();
            mPosition = 0;
        }

        //    X-Mms-Message-Type
        appendOctet(PduHeaders.MESSAGE_TYPE);
        appendOctet(PduHeaders.MESSAGE_TYPE_NOTIFYRESP_IND);

        // X-Mms-Transaction-ID
        if (appendHeader(PduHeaders.TRANSACTION_ID) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // X-Mms-MMS-Version
        if (appendHeader(PduHeaders.MMS_VERSION) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        //  X-Mms-Status
        if (appendHeader(PduHeaders.STATUS) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // X-Mms-Report-Allowed Optional (not support)
        return PDU_COMPOSE_SUCCESS;
private intmakeReadRecInd()
Make ReadRec.Ind.

        if (mMessage == null) {
            mMessage = new ByteArrayOutputStream();
            mPosition = 0;
        }

        // X-Mms-Message-Type
        appendOctet(PduHeaders.MESSAGE_TYPE);
        appendOctet(PduHeaders.MESSAGE_TYPE_READ_REC_IND);

        // X-Mms-MMS-Version
        if (appendHeader(PduHeaders.MMS_VERSION) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // Message-ID
        if (appendHeader(PduHeaders.MESSAGE_ID) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // To
        if (appendHeader(PduHeaders.TO) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // From
        if (appendHeader(PduHeaders.FROM) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // Date Optional
        appendHeader(PduHeaders.DATE);

        // X-Mms-Read-Status
        if (appendHeader(PduHeaders.READ_STATUS) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // X-Mms-Applic-ID Optional(not support)
        // X-Mms-Reply-Applic-ID Optional(not support)
        // X-Mms-Aux-Applic-Info Optional(not support)

        return PDU_COMPOSE_SUCCESS;
private intmakeSendReqPdu()
Make Send.req.

        if (mMessage == null) {
            mMessage = new ByteArrayOutputStream();
            mPosition = 0;
        }

        // X-Mms-Message-Type
        appendOctet(PduHeaders.MESSAGE_TYPE);
        appendOctet(PduHeaders.MESSAGE_TYPE_SEND_REQ);

        // X-Mms-Transaction-ID
        appendOctet(PduHeaders.TRANSACTION_ID);

        byte[] trid = mPduHeader.getTextString(PduHeaders.TRANSACTION_ID);
        if (trid == null) {
            // Transaction-ID should be set(by Transaction) before make().
            throw new IllegalArgumentException("Transaction-ID is null.");
        }
        appendTextString(trid);

        //  X-Mms-MMS-Version
        if (appendHeader(PduHeaders.MMS_VERSION) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // Date Date-value Optional.
        appendHeader(PduHeaders.DATE);

        // From
        if (appendHeader(PduHeaders.FROM) != PDU_COMPOSE_SUCCESS) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        boolean recipient = false;

        // To
        if (appendHeader(PduHeaders.TO) != PDU_COMPOSE_CONTENT_ERROR) {
            recipient = true;
        }

        // Cc
        if (appendHeader(PduHeaders.CC) != PDU_COMPOSE_CONTENT_ERROR) {
            recipient = true;
        }

        // Bcc
        if (appendHeader(PduHeaders.BCC) != PDU_COMPOSE_CONTENT_ERROR) {
            recipient = true;
        }

        // Need at least one of "cc", "bcc" and "to".
        if (false == recipient) {
            return PDU_COMPOSE_CONTENT_ERROR;
        }

        // Subject Optional
        appendHeader(PduHeaders.SUBJECT);

        // X-Mms-Message-Class Optional
        // Message-class-value = Class-identifier | Token-text
        appendHeader(PduHeaders.MESSAGE_CLASS);

        // X-Mms-Expiry Optional
        appendHeader(PduHeaders.EXPIRY);

        // X-Mms-Priority Optional
        appendHeader(PduHeaders.PRIORITY);

        // X-Mms-Delivery-Report Optional
        appendHeader(PduHeaders.DELIVERY_REPORT);

        // X-Mms-Read-Report Optional
        appendHeader(PduHeaders.READ_REPORT);

        //    Content-Type
        appendOctet(PduHeaders.CONTENT_TYPE);

        //  Message body
        makeMessageBody();

        return PDU_COMPOSE_SUCCESS;  // Composing the message is OK